Portable derrick.



PATENTED DEC. 13, 1904.

W. G. READ.

PORTABLE DERRICK.

APPLICATION FILED 111311.12, 1904.

2 SHEETS-SHEET 1.

N0 MODEL.

No. 777,307, h PA'ETENTED DEC. 18, 1904.

G. READ.

PORTABLE DERRICK.

APPLICATION FILED APR. 12, 1904.

no MODEL, 2SHEET-$HEET mtness esk Patented December 13, 1904.

WALTER G. HEAD, OF DAVISVILLE, UALIFORNI A.

PORTABLE DERRICK.

SPECIFICATION forming part of Letters Patent No. 777,307, dated December 13, 1904,

Application filed April 12, 1904. Serial No. 202,346. (No model.)

To all 7.1;700710 (12; 11mg concern:

Be it known that I, VVAr/rnn G. READ, a citi- Zen of the United States, residing at Davisville, in the county of Yolo and State of Ualifornia, have invented new and useful Improvements in Portable ,Derricks, of which the :tollowing is a specification.

My invention relates to improvements in that class of apparatus known as portable derricks.

It consists in the combination and arrangement of parts and in details of construction, which will be more fully explained by reference to the accompanying drawings, in which- Figure 1 is a side elevation of my apparatus. Fig. 2 is a plan view of the step. Fig. 3 is a side view of the same. Fig. 4 is a perspective view of a socket. Fig. 5 is a plan view of the base-frame. Fig. 6 is a transverse section of mast and side plates. Fig. 7 is a side viewoi same.

it is the object of my present invention to provide a rigid, compact, economically-ermstructed device,which can be compactly crated in a knockdown form for shipment and can be quickly set up and made ready for use and when thus set up can be easily moved from place to place contiguous to the point of use.

As shown in the drawings, A A are side timbers, which are here shown as rounded up at the ends, so as to form runners to enable the device to be easily drawn in any direction about the field. Transversely between these runners and near their ends are the connecting-bars B, which are united to the bars A. by bolts, as shown at Fig. 4, thus forming a rectangular base or structure. At each angle of this base are located metal castings consisting of angular plates 2, adapted to rest upon the intersections of the bars A and B, and inclined upwardly-extending socket 3, forming a junction with the plates 2 at their meeting angle. This socket, as shown, has three inclosingsides, and at the bottom has a Hat base or support A substantially at right angles with the sides of the socket. Upon these bases and within the sockets 3 at the four corners are supported the convergent timbers 5, wlnch form the supports for the mast to be hereina'l ter described. The upper ends of these timbers are united in a casting or yoke 6, having outwardly-inclined sockets, as at 7, the bases of which sockets are ada gited to receive the upper ends of the timbers 5. Thus the sockets 3 and 7 are so located as to stand in line with each other, and each having a floor or base at right angles with the inner sides it will be seen that the timbers 5 may be fitted into the sockets, and being cut square at the ends will have a thrust against a flat resisti lag-surface. These ln'ace-timbers support the casting 6, which has a hole made centrally throughit For the passage of the mast. The lower ends of the timbers 5 are securely bolted into the socket 3 and the upper ends in like manner into the sockets 7, the bolts being easily removable for the purpose of separating the apparatus for transportation.

8 is a step having equally-separated wings or lugs 9, adapted to receive the lower ends of rods 10, which are secured and adjusted by nuts upon their screw-threaded lower ends. and the upper ends of these rods pass through the casting 6 and are in like manner secured by nuts, so that the socket 8 is supported by these rods, which with the convergent timbers 5 resting upon the angular fl'ttlDG'liOllll a suliiciently-strong truss for this purpose.

The mast 11 has its lower end adapted to rest in the socket 8. The bottom of this socket has a raised circular center 12, around which is a depressed annular channel, as at 13, hav- I ing holes 1% made through it. The support for the mast. is thus of comparatively small diameter and causes but little friction in the turning, while the annular channel serves to receive any dirt which may accidentally get into the step around the mast, and the holes 14, allow for the escape of such dirt, thus simplifying the arrangement of the step and making it easy to keep in order.

At the bottom of the casting 8 are shown lugs 15, and these lugs are adapted to receive the inner ends of rods 16, which converge thereto from the four inner angles of the frame A B. The inner ends of these rods are screw-threaded and pass through the lugs 15 and may be drawn tight by nuts fixed upon these inner ends. The outer ends of these mast 11, as shown.

rods are similarly threaded and pass through applied and the device hauled from one part casting 3 and timber 5, with nut in the end secured in the angular castings which unite the corners of the timbers A and B, as previously described, and by means of the ad justing-nuts these rods are drawn tight, the socket 8 is rigidly held in the center, and the whole frame and these rods form a horizontal truss by which the bottom of the mast is supported, while the vertical rods 10 and the convergent brace-timbers 5 form a similar vertical truss, making a very strong and rigid structure.

The mast 11 has side plates 17 bolted to it, so as to extend a short distance above and below the casting 6 at the apex of the truss and through which the mast passes. These plates are made cylindrical at the point where they pass through the opening in casting 6, and thus present a circular face to turn within the correspondingly-shaped opening in the casting. These plates are important as adding strength at the point where otherwise a great strain would come upon the mast by reason of the thrust of the brace 18, the inner end of which is secured at this point, and the outer end supports the transverse boom 19, which extends angularly across the upper end of the A brace 20 extends between the boom 19 and the brace 18 at one side of the mast, and a second brace 20 extends from the mast to the shorter end of the boom 19.

Sheaves or pulleys 21 are suitably connected with opposite ends of the boom, and the hoisting-rope 22 is carried over these direction-sheaves, thence lead down to sheaves 23, which are adapted to be moved to any desired point upon the frame A and B dependent upon the direction of movement of the boom. This connection may be made by shackles and pins passing through holes in the frame, as at 24:. v

The plates 2 are secured to the timbers A and B by bolts passing through holes in these plates, and in order to prevent the bolt-heads from projecting below the bottom of the runners A the ends of the bolts may enter slots or openings 25 made transversely through the runners at a point intermediate between the top and bottom, so that the nuts can be introduced into these openings, and the bolts passing down through the plates 2 and coin cident with holes in the top of the runner may be screwed into the nuts within the open channels, and thus lock the parts firmly together.

26 shows a connection for a team or other means of hauling the apparatus, and it is here shown as connected by rods 27 with eyebolts or other fastenings upon the timbers B at 28; but this is only an illustration of one means by which such connection may be made, it being obvious that any suitable connection for the attachment of team or power may be l l l l l to another of the field.

The construction herein described provides for an easily set up and dismountable double truss-frame, with turnable mast and boom having great strength and capacity.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. A derrick and like frame comprising a rectangular base, angular convergent sockets at the corners, timbers having the lower ends fitting said sockets, a casting having corresponding sockets into which the upper ends of the timbers fit, said socket having a central opening, a step located vertically below said opening, means for suspending said lower step from the upper and retaining it centrally between the frame-timbers and a mast supported by said step and socket.

2. A derrick or like frame consisting of a rectangular base, angular plates secured at the junction of the base-timbers, said plates having convergent upwardly-extending sockets adapted to receive corresponding timbers, said sockets having internal base-plates substantially at right angles with the length of the timbers, and means for securing the timbers in said sockets.

3. A derrick or like frame composed of reetangularlyunited timbers having plates and bolts by which the junction of said timbers are united, convergent upwardly-extendingsockets having flat interior bases at right angles with their length, timbers having square ends adapted, to rest upon said bases, means for securing the timbers to the sockets, a casting h aving correspondingly-shaped sockets at its angles, said sockets adapted to receive the upper ends of the convergent timbers and having flat surfaces against which the upper ends of said timbers abut, a central opening in the casting, a mast turnable within said central opening, a step located in line beneath the casting to receive the lower end of the mast and a plurality of tension-rods connecting the step and the casting.

4. A derrick-support comprising a rectangular frame, castings composed of angular plates fitting the frame-corners and havingupwardly-convergent sockets,timbers fitting and secured in said sockets, other sockets formed upon the periphery of a casting and adapted to receive the convergent upper ends of the timbers, said casting having a vertical central opening, a mast guided and turnable within said opening, a step located substantially in the horizontal plane of the base-timbers, tension-rods convergent from the frame to said step whereby said step is adjustedin position with relation to the upper guide-casting, and means for supporting the step from said casting.

5. A derrick or like support comprising a rectangular base having angular plates and arr/7,307

upwardly-inclined sockets at its corners, a central casting with corres ionding sockets, timbers convergent from the lower to the upper sockets and means for securing them thereto, a central vertical opening in the upper casting, a mast tnrnable therein, a step located substantially in the plane of the base and adapted to receive the lower end of the mast, said step having lugs, screw-threaded rods having the outer ends secured at the angles oi the base-timbers and the inner ends convergent to and adjustable within the lugs ot' the step, and a plurality o'l rods whereby said step is suspended from the upper casting.

6. A derrick or like structure comprising a horizontal rectangular base, with timbers supported and convergent from its angles, a central casting with sockets in which the upper ends of said timbers are secured, a mastturnable through a central vertical opening in said casting, a step in which the lower end of the mast is supported, said step having a cylindrieal socket and a raised central boss upon which the mast rests, a surroundingdepressed channel and openings in the bottom of said channel for the escape of dirt.

7. A derrick comprising a rectangular frame, timbers convergent upwardly, a casting to which the upper ends of the timbers are secured, said casting having a central guide -opening and a mast passing therethrough, a step suspended from said casting substantially in the horizontal plane of the base-timbers, said step having lugs in line with the angles of the base, rods having the outer ends iixed at said angles and innerscrewthreaded ends passing through the lugs with nuts whereby the tension of the rods and the position of the step may be regulated, other lugs and a plurality of vertically-disposed rods, having the upper ends connected with a central casting and the lower ends screwthreaded with nuts whereby the step is suspended from the casting.

8. A derrick-mast support consisting of a horizontal rectangular frame, timbers fixed at the angles of said frame convergent to a common center, a casting having sockets in which the upper ends of said timbers are secured, said. socket having a central opening, a mast passing therethrough, a step located in the horizontal plane of the base and having a socket in which the bottom of the mast is turnable, rods convergent from the angles of the frame and having a screw-threaded connection whereby the step is supported and adjustable horizontally, other rods adj ustably connecting the step with the central casting above and forming with the horizontal rods a compound-truss support for the step.

9. A derrick comprising a mast having a boom fixed diagonally across its upper end and projecting unequally at either side of the mast, pulleys suspended from the ends of said boom, hoisting-ropes passing over said pulleys, a rectangular base, u p wardly-convergent timbers fixed at the angles of said base, a

guide-casting through which the mast passes,

a step located in the horizontal plane of the base having a socket to receive the mast, a compound truss consisting of a plurality of suspendingrods connecting the step with the casting above and other rods connecting the step with the surrounding rectangular frame, a (lirectionpulley and swivel-shackle, and means for attaching said shackle and pulley at different parts of the base-frame.

10. A derrick comprising a rectangular base, timbers converging from the angles of said base upwardly, a casting having sockets in which the upper ends of said timbers are lixed, a step located and supported in line beneath the tasting, a central opening made through the casting, a mast having its lower end su p ported in the step and passingthrough said casting, said mast having strengtheningplates bolted thereto and extending above and below the casting, said plates being made cylindrical at a point where they pass through the casting.

11. The combination in a derrick of a rectangular base, convergent timbers extending from the angles of said base, a casting having sockets in which the upper ends of said timbers are fixed, and a central vertical opening, a step, suspending-rods connecting it with the casting, horizontal diverging rods connecting the step with the frame, a mast having the lower end supported in the step, strengthening-plates bolted to the mast where it passes through the opening of the casting, said plates being made cylindrical to lit said opening, a boom fixed diagonally across the head of the mast having unequal lengths projecting at opposite sides of said mast, a hoisting-pulley carried by the longer arm of the boom, a brace extending from the outer end of said boom and having its inner end connecting with the strengthening-plates contiguous to the guide-casting through which the mast passes.

12. A eompoimd-trnss support for derrickmasts and the like, comprising a step for the bottom of the mast, a gui fle-sleeve for the mast located in line above the step, a base, converging timbers extending from the base and supporting the sleeve, tension-rods be tween the sleeve and the step, and other rods between the step and base-frame.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

- WALTER (3i. READ.

l/Vitn esses:

A. J. PLANT, M. (1. Don nn'rY. 

